Where Can I Buy Brass Knobs for my Alembic?

I have a beautiful Alembic with ugly old plastic control knobs. I want to install knobs that match the brass bridge, nut and truss rod cover. Ive Googled and asked the normal suppliers (Warmoth, StewMac, AllParts)  they only have chrome, black or gold.

Not sure about brass knobs, but you should seriously look into some custom, wooden knobs. www.thgknobs.com is a site with some great ones. Check out their gallery! Lots of cool stuff. Much cooler than brass knobs, IMO.

I've seen a couple of Alembic Tribute guitars that have what appear to be gold knobs. Personally, I like the plastic knobs better. Specific to your bass, I think the old style plastic knobs actually look pretty cool. If I were to do my custom again, I'd go with your exact knobs. Just my opinion.